THE DEMOCRATIC presidential candidates have some big plans -- with big price tags attached. By our calculations, using figures supplied by the campaigns, Sen. Hillary Rodham Clinton (N.Y.) has proposed new spending and tax breaks that would amount to almost $265 billion a year when fully implemented, while the initiatives proposed by Sen. Barack Obama (Ill.) total nearly $333 billion. Those initiatives, which would be phased in over time and which the candidates say they have identified ways of funding, don't include billions of dollars more in one-time spending.

In addition, both candidates would extend the Bush tax cuts for those making less than $250,000 a year, at an annual ...